First up I'd like to say that I enjoyed the game! I'm going through my second play through with the commentary on. It's great fun to see the subtle double-meanings in some of the dialogue coming through!
In terms of what Bennett is hiding, I'm pretty sure I know what it is...
Johnson dropped a big hint at the police department!
...but I'm struggling to see how I can unlock it as an achievement. Any hints would be appreciated.
Also, I'm racking my brains to try to figure out how to make sure Anna keeps her professional integrity. Having completed the game the first time round by breaking her oath, it'd be great to have some hints on how to do this the alternative way!